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UNITE STATES PATENT OFFICE.

ISRAEL R. BLUMENBERG, OF WASHINGTON, DISTRICT OF COLUMBIA.

COMPOUND FOR COVERINGS AND JOINT-PACKINGS.

SPECIFICATION forming part of Letters Patent No. 230,996, dated August 10, 1880.

Application filed July 12, 1880. (Specimen) To all whom it may concern Be it known that I, ISRAEL RUDOLPH BLUM- ENBERG, a citizen ofthe United States, residing at WVashington, in the District of Columbia, have invented new and useful Improvements in Generator-(Jovering and Joint-PackingOompounds for Vapor-Engines, of which the following is a specification.

My design is toprod uce a covering compound and joint-packing for use with vapor-engines, especially with those in which the carbon bisulphide is used as the motor. It is well known that when the heated vapors of this chemical come incontact with the moving parts, with the jointpackings, &c., it absorbs the lubricant. It is also well known that the liquid carbon bisulphide will also permeate castiron pipes, and to considerable extent escape through the joints of structures of any kind. For these reasons, more especially, vapor-engines ot'this class have generally failed of their functions, such is the potency of the material used.

My invention was conceived especially with reference to obtaining means for preventing pound may be smeared over the joints, the

threads of the joints, as plumbers use the red lead, and it may be spread with a trowel, spatula, or suitable tool over the generator and pipe surfaces and over the reservoir.

In mixing the compound I use barely enough glycerine to make a thick paste-the less glycerine the sooner the mass dries and hardens; but a slight excess of glycerine would merely retard the drying and hardening. hen this compound dries it becomes as hard and enduring as stone, and will eminently resistthe action of any volatile vapor, steam, or water. For any ordinary purpose the glycerine would act as the usual mixiugoil; but such is the antagonism otglycerine to volatile vapors that it assumes a new function for my compound. In addition to this the combination of litharge with glycerine produces another result utterly different from the combination of litharge with oil, for with glycerine the mass dries into a stony hardness in a manner analogous to but eminently greater in degree than the hardening of plaster-of-paris.

This compound is made only as needed for use; but it might be put up in hermeticallysealed cans and sold to the trade.

I claim- The generator and reservoir covering and joint-packing compound for vapor-engines, consisting of litharge and glycerine mixed to a mass, as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ISRAEL R. BLUMENBEBG. Witnesses:

A. E. H. JOHNSON, J. W. HAMILTON J oHNsoN. 

